Sentences with phrase «stable sheet of ice»

Not exact matches

Not only that but they are also on a moving glassier and the ice cores used for dating well they are taken from the interior of the ice sheet where the ice is quite stable and they don't get anywhere near 2 meters of snow per year.

But new analyses like this, which show previously undiscovered deep canyons, suggest that a good chunk of East Antarctica's bed lies below sea level, rendering the ice sheet less stable than previously thought.

Parts of the massive ice sheet once considered stable have been shown to be melting in new research

A large area of the Greenland ice sheet once considered stable is actually shedding massive amounts of ice, suggesting that future sea - level rise may be worse than expected, a team of scientists warned yesterday in a new study.

Many of the glaciers that jut out into the ocean are thinning, but whether the ice sheet itself has remained stable and intact, even during warm interglacial periods, is a matter of considerable debate.

A new study by David Sugden at the University of Edinburgh, UK, and colleagues suggests the ice sheet may be more stable than we thought.

A new study from Indiana University - Purdue University Indianapolis validates that the central core of the East Antarctic ice sheet should remain stable even if the West Antarctic ice sheet melts.

Of course, our study looks back in time and the future will be a very different place in terms of ice sheets and CO2 but it remains to be seen whether or not Earth's climate becomes more or less stable as we move forward from here.&raquOf course, our study looks back in time and the future will be a very different place in terms of ice sheets and CO2 but it remains to be seen whether or not Earth's climate becomes more or less stable as we move forward from here.&raquof ice sheets and CO2 but it remains to be seen whether or not Earth's climate becomes more or less stable as we move forward from here.»

Licht led a research team into the Transarctic Mountains in search of physical evidence that would verify whether a long - standing idea was still true: The East Antarctic ice sheet is stable.

The East Antarctic ice sheet has long been considered relatively stable because most of the ice sheet was thought to rest on bedrock above sea level, making it less susceptible to changes in climate.

«It turns out that for much of the East Antarctic Ice Sheet's history, it was not the commonly perceived large stable ice sheet with only minor changes in size over millions of years,» he saIce Sheet's history, it was not the commonly perceived large stable ice sheet with only minor changes in size over millions of years,» he Sheet's history, it was not the commonly perceived large stable ice sheet with only minor changes in size over millions of years,» he saice sheet with only minor changes in size over millions of years,» he sheet with only minor changes in size over millions of years,» he said.

The team in today's study were able to determine that the ice sheet had partially melted during this «stable» period by analysing the chemical content of mud in sediments.

Carys Cook, co-author and research postgraduate from the Grantham Institute for Climate Change at Imperial, adds: «Scientists previously considered the East Antarctic ice sheet to be more stable than the much smaller ice sheets in West Antarctica and Greenland, even though very few studies of East Antarctic ice sheet have been carried out.

By offering support for the idea that the EAIS has been largely stable during the last 14 million years, the research offers some hope that a massive collapse of the ice sheet, and associated sea level rise of tens of meters, may not be imminent.

Like frozen levees, the retreating glaciers pin back more stable parts of the Greenland - size ice sheet.

The warming of the WAIS is most worrisome (at least for this century) because it's going to disintegrate long before the East Antarctic Ice Sheet does «'' since WAIS appears to be melting from underneath (i.e. the water is warming, too), and since, as I wrote in the «high water» part of my book, the WAIS is inherently less stable:

What is alarming is that the volume of water and the extent and rapidity of its movement is suprisingly much greater than previously believed, and that a possible, perhaps likely, effect of this on ice sheet dynamics is to make the ice sheets less stable and more likely to respond more quickly to global warming than previously expected.

LONDON — Part of the East Antarctic ice sheet may be less stable than anyone had realized, researchers based in Germany have found.

The MISI is based on a number of studies that indicated the theoretical existence of the instability... The most fundamental derivation, that is, starting from a first - principle ice equation, states that in one - dimensional ice flow the grounding line between grounded ice sheet and floating ice shelf can not be stable on a landward sloping bed.

The East Antarctic ice sheet has long been considered very frozen and very stable — but a new analysis of some of its largest glaciers...

This was a relatively stable climate (for several thousand years, 20,000 years ago), and a period where we have reasonable estimates of the radiative forcing (albedo changes from ice sheets and vegetation changes, greenhouse gas concentrations (derived from ice cores) and an increase in the atmospheric dust load) and temperature changes.

If I may add one more speculative question: are the portions of glacial sheets formed during periods of high ice flux less stable, and more prone to calving, than those formed during slow flux?

Ice sheet extent and GHG levels were stable for almost all of this period, thus small lags of a century or two are irrelevent.

I am aware of modeling of the profile of the Greenland Ice Sheet that suggests that the ice will melt to a shape that is stabIce Sheet that suggests that the ice will melt to a shape that is stabice will melt to a shape that is stable.

Burning all fossil fuels, if the CO2 is released into the air, would destroy creation, the planet with its animal and plant life as it has existed for the past several thousand years, the time of civilization, the Holocene, the period of relative climate stability, warm enough to keep ice sheets off North America and Eurasia, but cool enough to maintain Antarctic and Greenland ice, and thus a stable sea level.

The East Antarctic Ice Sheet, long seen as the stable side of Antarctica's vast lode of ice, appears to have been losing mass, particularly in coastal regions, over the past three years, according to a new analysis using gravity measuremenIce Sheet, long seen as the stable side of Antarctica's vast lode of ice, appears to have been losing mass, particularly in coastal regions, over the past three years, according to a new analysis using gravity measuremenice, appears to have been losing mass, particularly in coastal regions, over the past three years, according to a new analysis using gravity measurements.

Under aggressive carbon cuts, more than half of these municipalities would avoid this commitment if the West Antarctic Ice Sheet remains stable.

As long as an ice sheet accumulates the same mass of snow as it loses to the sea, it remains stable.

Brooke C. Medley, a postdoctoral fellow with NASA who contributed to one of the new papers on Antarctic ice loss, said the findings demonstrate that the planet's large ice sheets, which were once thought to be stable, are responding to global warming and other influences at a rapid rate.

The ice plug sits on a ridge beneath the East Antarctic Ice Shelf in a region called the Wilkes Basin that has previously been overlooked in sea level projections, because it has appeared to be stable compared to regions of the West Antarctic Ice Sheet, which sits closer to sea levice plug sits on a ridge beneath the East Antarctic Ice Shelf in a region called the Wilkes Basin that has previously been overlooked in sea level projections, because it has appeared to be stable compared to regions of the West Antarctic Ice Sheet, which sits closer to sea levIce Shelf in a region called the Wilkes Basin that has previously been overlooked in sea level projections, because it has appeared to be stable compared to regions of the West Antarctic Ice Sheet, which sits closer to sea levIce Sheet, which sits closer to sea level.

The climate change had already affected the seas around Antarctica and is warming some coastal waters.So now both Antarctic Peninsula and West Antarctica Ice sheet are losing ice.For now, the East Antarctic Ice sheet is stable but it will influence on global climate change due to sea ice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioIce sheet are losing ice.For now, the East Antarctic Ice sheet is stable but it will influence on global climate change due to sea ice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioice.For now, the East Antarctic Ice sheet is stable but it will influence on global climate change due to sea ice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioIce sheet is stable but it will influence on global climate change due to sea ice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioice that meant it will effect to climate change and the ecosystem of the regions?

The data used in the study included more than 455,000 independent estimates of changes in the land elevation of the vast ice sheets covering Antarctica, both in the western part of the continent, where ice is melting more rapidly, and in the east, where the ice is considered to be more stable, for the time being at least.

The team used changes in dust levels and stable water isotopes in the annual ice layers of the two - mile - long Greenland ice core, which was hauled from the massive ice sheet between 1998 to 2004, to chart past temperature and precipitation swings.

A leading theory, presented by Dr. Bill McGuire, Hugh Tuffin, J. Maclennan, Peter Huybers and many others is that changes in stress to the Earth's crust caused by the loss of billions of tons of mass by ice sheets and the displacement of those billions of tons into the world's ocean system spurred previously stable magma systems into a chaotic displacement.

Excluding slow feedbacks was appropriate for simulations of the past century, because we know the ice sheets were stable then and our climate simulations used observed greenhouse gas amounts that included any contribution from slow feedbacks.

Thus, West Antarctica is not the only potential source of rapid change; part of the East Antarctic ice sheet is also susceptible to rapid retreat because of its direct contact with the ocean and because the bed beneath the ice slopes landward (Fig. 1), which makes it less stable.

Since to me (and many scientists, although some wanted a lot more corroborative evidence, which they've also gotten) it makes absolutely no sense to presume that the earth would just go about its merry way and keep the climate nice and relatively stable for us (though this rare actual climate scientist pseudo skeptic seems to think it would, based upon some non scientific belief — see second half of this piece), when the earth changes climate easily as it is, climate is ultimately an expression of energy, it is stabilized (right now) by the oceans and ice sheets, and increasing the number of long term thermal radiation / heat energy absorbing and re radiating molecules to levels not seen on earth in several million years would add an enormous influx of energy to the lower atmosphere earth system, which would mildly warm the air and increasingly transfer energy to the earth over time, which in turn would start to alter those stabilizing systems (and which, with increasing ocean energy retention and accelerating polar ice sheet melting at both ends of the globe, is exactly what we've been seeing) and start to reinforce the same process until a new stases would be reached well after the atmospheric levels of ghg has stabilized.

It used to be considered the last stable part of the Greenland ice sheet,» said one of the team, Michael Bevis of Ohio State University in the US.

A region of the Greenland ice sheet that had been thought to be stable is undergoing what glaciologists call «dynamic thinning».

Previous studies had identified melting of glaciers in the island's south - east and north - west, but the assumption had been that the ice sheet to the north - east was stable.

A recent study validates that the core of the East Antarctic ice sheet should be stable if the West Antarctic ice sheet does melt entirely.

LONDON, 4 May — Part of the East Antarctic ice sheet may be less stable than anyone had realised, researchers based in Germany have found.

Most of that ice is — for now — stable, but scientists are concerned that the massive West Antarctic Ice Sheet, which holds about 11 feet of potential sea level rise, has reached a tipping point and will collapice is — for now — stable, but scientists are concerned that the massive West Antarctic Ice Sheet, which holds about 11 feet of potential sea level rise, has reached a tipping point and will collapIce Sheet, which holds about 11 feet of potential sea level rise, has reached a tipping point and will collapse.

Is it any wonder that the Ice Sheet without geothermal activity is remarkably stable and the Ice Sheet that has increased ice discharge has vast evidence of geothermal activiIce Sheet without geothermal activity is remarkably stable and the Ice Sheet that has increased ice discharge has vast evidence of geothermal activiIce Sheet that has increased ice discharge has vast evidence of geothermal activiice discharge has vast evidence of geothermal activity?

While Greenland's ice loss is astonishing, on the other side of the globe, parts of Antarctica's vast ice sheet may be even less stable.

Ice sheet collapse following a prolonged period of stable sea level during the last interglacial.

What is alarming is that the volume of water and the extent and rapidity of its movement is suprisingly much greater than previously believed, and that a possible, perhaps likely, effect of this on ice sheet dynamics is to make the ice sheets less stable and more likely to respond more quickly to global warming than previously expected.

A new study from Columbia University's Lamont - Doherty Earth Observatory and Indiana University - Purdue University Indianapolis validates that the central core of the East Antarctic ice sheet should remain stable even if the West Antarctic ice sheet melts.